A Primer for Eastern and Southern Africa Norman, D. W. creator Siebert, J.D. Modiakgotla, E. Worman, F.D. text Gaborone, Botswana Farming Systems Programme c 1994 monographic iiixi, 148 p. : ill. by D.W. Norman, J. D. Siebert E. Modiakgotla and F. D. Worman. Includes bibliographical references and appendices Farming Research Systems S494.5 .N67 1994 UOEL 000 20260202082943.0